Diana got killed because she got in a car driven by a drunk driver and didn't bother to put on her safety belt. A very silly way to go, but that's how things go.
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I can't see why people get all indignant about the Royal Family. "The lottery of birth" is just another lottery after all, and noone gets all steamed up about people who win the other lotteries. If we're to have rich people around, I think I'd sooner they were people who knew they'd done nothing to earn it, rather than those who think it was all down to their own actions.

At least, if you know you haven't earned your privileges, there's a chance you might be aware of some kind of responsibility to do something towards deserving them. Doesn't always work of course, but the signs are that's how Charles sees it, and that he is reasonably aware of the absurdity of the whole business.